95614 - Initialized an iterator and replaced NS_ENSURE_SUCCESS ( which asserts), since the result code from nsScanner::Peek() does not indicate an exceptional condition, with equivalent code. r=heikki, sr=waterson.

parser/htmlparser/src/nsHTMLTokens.cpp

@@ -547,6 +547,7 @@ nsresult CTextToken::Consume(PRUnichar aChar, nsScanner& aScanner,PRInt32 aFlag)
   start = origin;
   ++start;
   aScanner.SetPosition(start);
+  aScanner.EndReading(end);
 
   while((NS_OK==result) && (!done)) {
     result=aScanner.ReadUntil(start, end, theEndCondition, PR_FALSE);